More efficient filtering of runtime receiver type variants in debugger

idea/idea-completion/testData/basic/codeFragments/runtimeType/runtimeCast.kt

@@ -8,16 +8,25 @@ open class Base {
 
     open fun funWithOverride() { }
     open fun funWithoutOverride() { }
+
+    fun funInBoth() { }
 }
 
 class Derived: Base() {
     fun funInDerived() { }
 
     override fun funWithOverride() { }
+
+    fun funInBoth(p: Int) { }
 }
 
 // INVOCATION_COUNT: 1
-// EXIST: funInBase, funWithOverride, funWithoutOverride, funInDerived
+// EXIST: funInBase
+// EXIST: funWithOverride
+// EXIST: funWithoutOverride
+// EXIST: funInDerived
+// EXIST: { itemText: "funInBoth", tailText: "()", attributes: "bold" }
+// EXIST: { itemText: "funInBoth", tailText: "(p: Int)", attributes: "grayed" }
 // NOTHING_ELSE